GE SPM Series, Instruction Manual

Page: 110 / 126

10-
6
SPM Synchronous Motor Protection & Control GE Power Management
10.6 BRUSHLESS MOTOR POWER FACTOR TEST 10 FUNCTIONAL TESTS
10
10.6 BRUSHLESS MOTOR POWER FACTOR TEST 10.6.1 SETUP
1. Connect the Va and Vb terminals of the 3-phase tester to SPM terminals B9 and B10 (control power and
PF voltage reference) respectively. Program for 120 V AC. To test the OPTIONAL PF REFERENCE input
connect Va and Vb to terminals A4 and A5 and 120VAC to B9 and B10.
2. Connect Ia of the 3-phase tester terminals B3 and B4 and Ib to terminals B1 and B2. Polarity is critical.
Note: Ic outputs of 3-phase tester may have to be shorted if they cannot be turned off. Program for 4 A.
3. Connect the Switch to terminals A11 and A12 of the SPM (MX input). Close switch.
4. Connect multimeter to TRIP relay outputs to monitor relay status.
10.6.2 RELAY PROGRAMMING
a) CONFIGURATIONS
Program as defaults shown in Section 5.4: CONFIGURATIONS MENU on page 5–12 except for the following:
• PF REF: External (if testing the external PF voltage reference)
b) SETPOINTS
Program as defaults shown in 5.2: SETPOINTS MENU on page 5–2.
10.6.3 TEST
1. Apply control power to relay and wait for self-test diagnostic to complete. Should get SPM READY mes-
sage and TRIP relay should close.
2. Turn on current source.
3. Open MX switch
4. FAR contact should close after programmed delay followed by FCX contact. FIELD IS APPLIED message
should momentarily flash on screen.
5. PF metered value will now be displayed along with other metered values.
6. Vary voltage angle as in table below and check PF reading.
Table 10–5: BRUSHLESS MOTOR PF TEST RESULTS
ANGLE EXPECTED PF ACTUAL PF
0° 1
25° 0.9
65° 0.4
317° –0.74
341° –0.95